<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <title>Document</title>
  <style>
    
  </style>
</head>
<body>

  <select>
    <option value="">北京</option>
    <option value="">上海</option>
    <option value="">深圳</option>
    <option value="">广州</option>
    <option value="">杭州</option>
    <option value="">南京</option>
  </select>

</body>
<script>
  
</script>
</html>